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Table 3 Breast cancer characteristics of study population, N = 4926

From: Factors associated with breast cancer recurrences or mortality and dynamic prediction of death using history of cancer recurrences: the French E3N cohort

  No. of women Percentage
Estrogen/Progesterone receptors Status
 positive / positive 2321 47.1
 positive / negative 770 15.6
 negative / positive 161 3.2
 negative / negative 636 12.9
 missing 1038 21.1
Grade
 well differentiated 650 13.2
 moderately differentiated 1517 30.8
 poorly differentiated 1965 39.9
 missing 794 16.1
Tumor size
  < 2 cm 3694 74.0
  ≥ 2 cm 956 18.5
 missing 276 5.6
Axillary nodal involvement
 no 3233 65.6
 yes 1378 27.9
 missing 315 6.4
Year of diagnosis
 1990–1994 1010 20.5
 1995–1999 1472 29.9
 2000–2003 1321 26.8
 2004–2008 1123 22.8